<HTML><HEAD><TITLE>ord_union(+Sets, -Union)</TITLE>
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<H1>ord_union(+Sets, -Union)</H1>
Computes the union of all sets in Sets
<DL>
<DT><EM>Sets</EM></DT>
<DD>A list of sets
</DD>
<DT><EM>Union</EM></DT>
<DD>A set or variable
</DD>
</DL>
<H2>Description</H2>
	Succeeds when Union is the union of all sets in the list Sets.
    
<H3>Modes and Determinism</H3><UL>
<LI>ord_union(+, -) is det
</UL>
<H2>See Also</H2>
<A HREF="../../lib/ordset/ord_union-3.html">ord_union / 3</A>, <A HREF="../../lib/ordset/ord_intersection-2.html">ord_intersection / 2</A>
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